Merge #5179

5179: Add loglevel config (fixes #5178, fixes #5174) r=heinrich5991 a=def-

<!-- What is the motivation for the changes of this pull request -->

## Checklist

- [x] Tested the change ingame
- [ ] Provided screenshots if it is a visual change
- [ ] Tested in combination with possibly related configuration options
- [ ] Written a unit test if it works standalone, system.c especially
- [ ] Considered possible null pointers and out of bounds array indexing
- [ ] Changed no physics that affect existing maps
- [ ] Tested the change with [ASan+UBSan or valgrind's memcheck](https://github.com/ddnet/ddnet/#using-addresssanitizer--undefinedbehavioursanitizer-or-valgrinds-memcheck) (optional)


Co-authored-by: def <dennis@felsin9.de>

data/autoexec_server.cfg

@@ -52,6 +52,9 @@ sv_register 0
 # File where server log will be stored
 logfile "autoexec_server.log"
 
+# Log level (0 = Error, 1 = Warn, 2 = Info, 3 = Debug, 4 = Trace)
+loglevel 2
+
 # Folder where map records will be saved
 sv_score_folder "records"
 

src/base/log.cpp

@@ -3,6 +3,8 @@
 #include "color.h"
 #include "system.h"
 
+#include <engine/shared/config.h>
+
 #include <atomic>
 #include <cstdio>
 
@@ -67,6 +69,9 @@ void log_set_scope_logger(ILogger *logger)
 
 void log_log_impl(LEVEL level, bool have_color, LOG_COLOR color, const char *sys, const char *fmt, va_list args)
 {
+	if(level > g_Config.m_Loglevel)
+		return;
+
 	// Make sure we're not logging recursively.
 	if(in_logger)
 	{

src/engine/shared/config_variables.h

@@ -11,6 +11,7 @@ MACRO_CONFIG_STR(PlayerClan, player_clan, 12, "", CFGFLAG_SAVE | CFGFLAG_CLIENT
 MACRO_CONFIG_INT(PlayerCountry, player_country, -1, -1, 1000, CFGFLAG_SAVE | CFGFLAG_CLIENT | CFGFLAG_INSENSITIVE, "Country of the player")
 MACRO_CONFIG_STR(Password, password, 32, "", CFGFLAG_CLIENT | CFGFLAG_SERVER | CFGFLAG_NONTEEHISTORIC, "Password to the server")
 MACRO_CONFIG_STR(Logfile, logfile, 128, "", CFGFLAG_SAVE | CFGFLAG_CLIENT | CFGFLAG_SERVER, "Filename to log all output to")
+MACRO_CONFIG_INT(Loglevel, loglevel, 2, 0, 4, CFGFLAG_SAVE | CFGFLAG_CLIENT | CFGFLAG_SERVER, "Log level (0 = Error, 1 = Warn, 2 = Info, 3 = Debug, 4 = Trace)")
 MACRO_CONFIG_INT(ConsoleOutputLevel, console_output_level, 0, 0, 2, CFGFLAG_CLIENT | CFGFLAG_SERVER, "Adjusts the amount of information in the console")
 MACRO_CONFIG_INT(ConsoleEnableColors, console_enable_colors, 1, 0, 1, CFGFLAG_CLIENT | CFGFLAG_SERVER, "Enable colors in console output")
 MACRO_CONFIG_INT(Events, events, 1, 0, 1, CFGFLAG_SAVE | CFGFLAG_CLIENT | CFGFLAG_SERVER, "Enable triggering of events, (eye emotes on some holidays in server, christmas skins in client).")